#!/bin/bash

# Copyright (C) 2018, Xavier <yadd@debian.org>
#
# This program is free software; you can redistribute it and/or modify it
# under the terms of the GNU General Public License as published by the
# Free Software Foundation; either version 3 of the License, or (at your
# option) any later version.
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
# Public License for more details.
#
# On Debian systems, the complete text of the GNU General Public License
# version 3 can be found in the /usr/share/common-licenses/GPL-3 file.

echo '======================================================================='
echo "*** uscan $TESTTYPE test ***"
echo '======================================================================='

test_dir=$(readlink -f "${0%/*}")

# Operation mode
if test "${1:-}" = --installed; then
    shift
else
    top_srcdir=$(readlink -f "${0%/*}/..")
    make -C "$top_srcdir/scripts" uscan mk-origtargz uupdate debchange
    PATH="$top_srcdir/scripts:$PATH"
    export PATH
    PERL5LIB="$top_srcdir/lib"
    export PERL5LIB
fi

GPGHOME=$(mktemp -d -t gpg.XXXXX)

GPG=gpg
if ! command -v $GPG >/dev/null 2>&1; then
    echo "$GPG missing"
    exit 1
fi

PRIVATE_KEY=$test_dir/uscan/PRIVATE_KEY.asc
PUBLIC_KEY=$test_dir/uscan/PUBLIC_KEY.asc
PRIVATE_KEYRING=$GPGHOME/secring.gpg
PUBLIC_KEYRING=$GPGHOME/pubring.gpg

# magic function that pipes stdout and stderr into a pipe, and prints it only
# on command failure.
# This uses a pipe, so it has limited capacity.  Do not use it with stuff
# outputting too much data.
chronic_sh (){
    local pipe pipe_q
    pipe=$(mktemp -p "$SHUNIT_TMPDIR" devscripts_chronic_sh.XXXXXXXXXX)
    printf -v pipe_q '%q' "$pipe"
    trap 'rm -fv '"$pipe_q" RETURN
    # one can't open a reading fd and a writing fd without blocking, because
    # they want to already have something on the other side of the pipe.
    # the temporary fd 5 will be that something.
    exec 5<>"$pipe" # hack
    exec 3>"$pipe"  # writing fd
    exec 4<"$pipe"  # reading fd
    exec 5>&-       # end hack
    rm "$pipe"

    local ret=0
    "$@" >&3 2>&3 || ret=$?
    if [ "$ret" -ne 0 ] ; then
        exec 3>&-
        cat <&4-
        return $ret
    fi
}

oneTimeSetUp () {
    chronic_sh $GPG -v --homedir "$GPGHOME" --no-options -q --batch --no-default-keyring \
        --output "$PRIVATE_KEYRING" --dearmor "$PRIVATE_KEY"

    chronic_sh $GPG -v --homedir "$GPGHOME" --no-options -q --batch --no-default-keyring \
        --output "$PUBLIC_KEYRING" --dearmor "$PUBLIC_KEY"

    echo "Using test OpenPGP key:"
    $GPG --homedir "$GPGHOME" --no-options -q --batch --no-default-keyring \
        --default-key CF218F0E7EABF584B7E20402C77E2D6872543FAF \
        --list-keys --verbose

    export GNUPGHOME=$GPGHOME
}

oneTimeTearDown () {
    gpgconf --homedir "$GPGHOME" --verbose --kill gpg-agent
    rm -rf "$GPGHOME"
}

spawnHttpServer () {
    unset http_proxy
    local pid
    [ -n "$TEMP_PKG_DIR" ] || fail "unexpected testsuite error"
    (
        mkdir -p "$TEMP_PKG_DIR"/repo
        cd "$TEMP_PKG_DIR"/repo || exit 1
        python3 "$test_dir/uscan/httpserver.py" 2>log &
        pid=$!
        echo "$pid" > pid
        while ! [ -s port ]; do
            sleep 2s
            if ! kill -0 "$pid" 2> /dev/null ; then
                echo "The HTTP server returned an error:"
                cat log
                exit 1
            fi
        done
    )
}

killHttpServer () {
    if [ -n "${TEMP_PKG_DIR:-}" ] && [ -f "$TEMP_PKG_DIR/repo/pid" ]; then
        local pid
        pid=$(< "$TEMP_PKG_DIR/repo/pid")
        kill -9 "$pid"
        rm -rf "$TEMP_PKG_DIR"
        unset TEMP_PKG_DIR
    fi
}
